Via the Chicago Tribune, Congressman Mark Kirk is introducing a bill to set penalties at up to 25 years for some pot offenses, that would apply to first time offenders:

U.S. Rep. Mark Kirk will call for legislation Monday that would toughen drug-trafficking laws regarding a highly potent form of marijuana, with penalties of up to 25 years in prison for a first-time offense.
The law would target offenders who sell or distribute marijuana that has a THC content exceeding 15 percent.